Help Blacking a Tape/Time Code

[sb]

NTSC video is always 29.97.

Drop frame and Non Drop Frame are just ways to count frames, they don't
affect the actual video frame rate at all.

All the stuff about physics and speed is non-sensical.

 sb

On 8/11/03 3:40 PM, "Derek Roff" <derek at unm.edu> wrote:
> 
> The term "working in Non-Drop Frame" in the above statement is
> ambiguous, as is the situation that we are discussing.  We don't know
> exactly who is working on what, in what system.  Whether the "hour"
> of video is long, short or just right depends on whether, and how, it
> is shifted between drop-frame and non-drop frame.
> 
> An hour of broadcast, drop frame video displays 107,892 frames of
> video at 29.97 frames per second.  An hour of non-drop frame (30 fps)
> video would contain 108,000 frames.  So if you are editing in
> drop-frame, and "broadcasting" in non-drop frame, then the video will
> come up short by 3.6 seconds per hour, when broadcast.  If you edit
> in non-drop frame, and broadcast in drop frame, then the video will
> run long by 3.6 seconds.
> 
> Drop-frame exists because of the physics of wireless TV broadcasting.
> If a program isn't going to be sent out over the airwaves of
> broadcast television, then the difference in speed between drop-frame
> and non-drop frame has little importance.  For short projects, which
> the original posting mentioned, the difference in run time between
> drop frame and non-drop frame is easy to ignore.  So I am curious as
> to why this project seems to be specified in non-drop frame.
> 
> But it gets weirder.  The original posting quoted the specification
> as saying:  "all material should be striped at 29.97 NDF."  29.97
> frames per second is the drop-frame video speed.  30 frames per
> second is the speed for non-drop frame.  "29.97 NDF" seems like an
> untenable hybrid.
> 
> Can anyone explain "29.97 NDF"?  Am I suffering from brain lock, or
> is the film festival's specification confused?
> 
> Derek Roff
> Language Learning Center, MSC03-2100
> Ortega Hall Rm 129, 1 University of New Mexico
> Albuquerque, NM 87131-0001
> 505/277-7368, fax 505/277-3885
> Internet: derek at unm.edu
> 
> ----------
> <http://www.themacintoshguy.com/lists/MacDV.html>.
> Send a message to <MacDV-DIGEST at themacintoshguy.com> to switch to the digest
> version.
> 
> XRouter | Share your DSL or cable modem between multiple computers!
> Dr. Bott | Now $139.99      <http://www.drbott.com/prod/xrouter.html>
> 
>  Cyberian   | Support this list when you buy at Outpost.com!
>  Outpost    |         http://www.themacintoshguy.com/outpost.shtml
> 
> MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879!
> Norton AntiVirus 6 Only $19! We Stock PARTS! <http://www.macresq.com>
>